The Middle Ages or Medieval period is a period in European history lasting from the 5th until the 15th centuries. It began with the collapse of the Western Roman Empire, and was followed by the Renaissance and the Age of Discovery. The Middle Ages is the middle period of the traditional division of Western history into Classical, Medieval, and Modern periods. The period is subdivided into the Early Middle Ages, the High Middle Ages, and the Late Middle Ages.

In the Early Middle Ages, depopulation, deurbanization, and barbarian invasions, which began in Late Antiquity, continued. The barbarian invaders formed new kingdoms in the remains of the Western Roman Empire. In the 7th century North Africa and the Middle East, once part of the Eastern Roman Empire (the Byzantine Empire), became an Islamic Empire after conquest by Muhammad's successors. Although there were substantial changes in society and political structures, the break with Antiquity was not complete. The still-sizeable Byzantine Empire survived and remained a major power. The empire's law code, the Code of Justinian, was widely admired later in the Middle Ages. In the West, most kingdoms incorporated extant Roman institutions, while monasteries were founded as Christianity expanded in western Europe. The Franks, under the Carolingian dynasty, established an empire covering much of western Europe; the Carolingian Empire endured until the 9th century, when it succumbed to the pressures of invasion—the Vikings from the north, the Magyars from the east, and the Saracens from the south.